Yid·dish 
(yĭdĭsh)
(yĭdĭsh)n.
The language historically of Ashkenazic Jews of Central and Eastern Europe, resulting from a fusion of elements derived principally from medieval German dialects and secondarily from Hebrew and Aramaic, various Slavic languages, and Old French and Old Italian.
[Yiddish yidish, Jewish, Yiddish, from Middle High German jüdisch, Jewish, from jude, jüde, Jew, from Old High German judo, from Latin Iūdaeus; see JEW.]
Yiddish adj.